Or maybe they will launch Win 12 with optional TPM support.
Imho making the OS(es) TPM only cannot be good for their business, many people are still on Win 10 with no intention to switch, since their motheboard does not support TPM and do not want to upgrade PC / waste PCI-E slot on TPM extension.
It’s not that Windows isn’t profitable, it’s that Office is insanely profitable. There’s a running joke inside MS that Office pays the bills, everything else is icing on the cake.